Rotary valve for internal-combustion engines



Patented Mer. ld, i924.

OCAEJ L. DUGGER, OF EVNSVLLE, INILIAIA, iSSIC-I-NR GI? ONE-FOURTH TO CHARLES HOOBE, l? VANDEEBUEG- COUNTY? NDANA.

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.ap-pnizationisied. atleast e To all whom it may concern: Be it known that l, OSCAR L. Dussen, la citizen of the lUnited lStates, residing at Evansville, in .the 'county of Vanderburg and State of lndiana,have invented certain new and useful lmprovenients in Rotary Valves for lnternal-Combustion Engines, of which the following is a specification.

rllhis invention relates to rotary valves Vfor internal combustion engines.

lt has been proposed heretofore to pro vide one or more rotary valves to controlthe intake and exhaust from the cylinders of internal combustion engines but, as previously constructed, such valves have not been entirely satisfactory because they have been subject to the force of the explosion of the cylinder, have been dicult to pack, to keep cool, and are subject to too much friction. My invention has for its object the provision of a rotary valve in either single or duplex form, which will be of such improved construction that it will greatly, if not entirely, overcome theV foregoing defects inci- 251' dent to rotary valves when used on internal combustion engines, and to that end it embodies certain improvements and novel relationships and combinations of parts appearing more fully hereinafter.

ln carrying out my invention, the rotary valves are mounted in and carried by the cylinder head so that the head may be removed without dismantling the valve actionn Furthermore, the valves are subject to the action of the vwater` jacket, thus insuring against too great increase in their teinperature with incident warping, sticking, and allied defects. rlhe cylinder head and the valve casings are made in sectional forin and there are employed novel tubular conduits serving as ports connecting the valves and the cylinder, together with meansfto edectively pack the parts, and adjustable means whereby the tubular conduits which serve as ports may beset at just the right tension to avoid leakage while, at'the saine time, minimizing friction on the valves.

My improved valvey is not adected by carbon deposits or warp-age because its parts turn freely in their seats. The rotary valves bustioii engines.

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wit-lr be ren and the disclosure of the invention, which is of a of the'scope of the invention.

preferred lembodiment thereof, is to be com- -sidered as illustrative, instead of restrictive,

7 Figure l isa vertical-section through a cylinder Vof a four-cycle internal comb ustion engine equipped with'my improved valve; 2 is a detail'plan view of the pair of -valves shown in ll ig. 1, and.

Fig. 3 is a detail view of a single valve which may be employed in Vlieu of the pair of valves. Y

i have only illustrated one cylinder internal combustion engine to whic of the h the present valve is shown applied but it will be understood from Figure 2 that the remaining cylinders will have the same arrangement as shown in Figure l, as the valve can be used for any number of'cylinders cast en bloc.

The piston appears at land the cy at 2, the latterhaving water jacket 8.

linder The spark plug llis let intothe side of the cylinder.

The cylinder head 5 is of special form and .2

contains my improved valve or valv cording as one or two are used.

lnhe cylinder head 5 is hollow, as shown at 6 for the circulation of -the water,

water manifolds 5 being used, thereby insuring cooling of the valve or valves employe d. ln

"the use of rotary valves for internal'coni- 'lhe valve casings appear vat Y and the rotary valves are shown at 8.

the valves e are duplex, butha're so se 'By reference to Fig. 2 it will be seen that t that they will properly function :aslhereinafter `described. Said valves are suitably journaled at their ends 9 and between cylinders where necessary and are connected by gear pinions l0 of equal diameter so that the timing of the valve is exactly correct.

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valves may be driven at one end by a gear or sprocket or any other suitable device, not shown, from the crank shaft of the engine, at one-half of the crank shaft speed. My valves 8 are each formed of a single solid piece of metal provided with pockets 11. rEhe pockets 11 at the left hand end of Fig. 2 control the intake and exhaust of the irst cylinder; the second set of pockets 11 control the second cylinder, and so on.

The valve casings 7 are in communication, at predetermined times, with the cylinder 2 through slidably mounted tubular conduits 12. These conduits serve as ports; each has one end slidable in an opening 13 in the inner end of the cylinder head 5. The other ends of the conduits 12 are concaved and vbear against the valves 8, as shown at 14:, and

they slide loosely through openings 15 in the web 16. The conduits 12 are suitably packed as at 17. Diaphragms engaged with the con duits may be employed for packing them, if preferred.

A plate 21 which has its ends engaged with lugs 22 carried by the conduits 12, is pressed upwardly by springs 23 of which only one is shown. The springs 23 in connection with the plate 21 torce the conduits 12 upwardly to cause their upper ends 14: to bear upon the valves 8. For the purpose of regulating this pressure to a nicety, so that there will be a suitably tight connection at 1li, and nevertheless undue fric-- tion will be prevented, there is provided a screw or screws 24 threaded through the web 16 and the outer part of the cylinder head 5 and adjustable from the exterior of the cylinder head. A micrometer scale 24a on the head or stem of screw 24 and markings on the cylinder head serve as an indicator.

Cap screws 25 extending down through the cylinder head 5, connect it to the cylinder 2.

On. removing the screws 25, the entire cylinder head 5 may be taken off without distributing the valve action.

The cylinder head 5 is preferably formed in two sections :-a lower section 5*1 and an upper section 5b detachably connected to gether by the cap screws 20, and also iastened together by screws 25 which connect the entire cylinder head to the cylinder. There is a cap plate 5C surmounting section 5b. The screws 25 fasten the cap plate 5C.

lThe manifolds 26, 26, may be cast integral with, or bolted to, upperV sect-ion 5b. Manifold 26 serves for the intake and 26a for the exhaust.

There is shown in Fig. 3 a single valve vwhich may be used in lieu of the duplex valve of Figs. 1 and 2. When this valve is used, modiiication of the cylinder head 5 is required, but conduits such as 12 will be employed in connection therewith and there will be used spring pressure means such as 21 and 23 and regulating means such as 211. The pockets are arranged in pairs 11a, 11b, 11, 11d for the` cylinders of the engine, the pockets of each pair being arranged one in advance of the other. To suit this arrangement two of the conduits 12 will be employed on a line with each other, one in advance oi? the other, to co-operate with the pair of pockets 11a, for instance. The valve of Fig. 3 which is designated 8a, will be positively driven by a gear or sprocketV or other suitable device 'from the crank shaft of the engine.

Referring to Fig. 1, the right hand valve 8 is in position to exhaust the burnt gases, and the lett hand valve 8 is closed. As-

suming that the piston 1 Vis on its upward.

stroke, when it reachesV the upper limit of its stroke the right hand valve 8 will have closed the conduit 12, and the left hand valve 8 will have begun to open the left hand conduit 12 which it will hold open to the intake 26 until the piston has reached the lower limit of its stroke, whereupon the left hand valve 8 will close the left hand conduit 12 and hold it closed while the piston travels up on its compression stroke, down on its liring stroke, and u on its exhaust stroke. The right hand va ve 8 which controls the exhaust to 26L remains closed during the intake stroke and the compression and firing strokes of the piston and opens again on the exhaust stroke.

What l claim is 1. The combination with a cylinder of an internal combustion engine, of a head therefor, a rotary valve in said head, a slidable conduit affording communication between the cylinder and the valve and bearing on the latter, spring-means actuating the conduit toward the valve, and means, operable from the exterior of the head, adapted for limiting the movement of said spring'- means to determine the relationship of Vthe conduit to the valve.

2. The combination with a cylinder of an internal combustion engine, of a removable head or said cylinder, a pair of rotary valves carried by said head and unitary therewith, one ci said valves'controlling the intake to, and the other the exhaust trom, said cylinder, and slidable tubular conduits carried by the head and in commimication with the cylinder, said conduits bearing against said valves, a plate for simultaneously moving said conduits, a spring cooperating with the plate to press the conduits against the valves, and a screw, operable trom the exterior of the head, adapted for adjusting said plate.

3. The combination with a cylinder of an internal combustion engine, or' a removable head for said cylinder, a pair of rotary valves carried by said head and unitary therewith, one of said valves controllin the intake to, and the other the exhaust rom, said cylinder, movable tubular conduits carried by said head and communicating with said cylinder and in contact with said valves, means for packing said conduits, and spring-actuated means carried by the head for holding said conduits in effective position for control by said valves, and means, operable from the exterior of the head, adapted for adjusting said conduits.

In testimony whereof I aiiix my signature.

OSCAR L. DUGGER. 

